Encapulate tBTM_SEC_DEV_REC::pin_code_length am: 965f4fcd

  RawAddress bd_addr;      /* BD_ADDR of the device              */

  DEV_CLASS dev_class;     /* DEV_CLASS of the device            */

  LinkKey link_key;        /* Device link key                    */

 private:

  friend bool BTM_SecAddDevice(const RawAddress& bd_addr, DEV_CLASS dev_class,

                               BD_NAME bd_name, uint8_t* features,

                               LinkKey* p_link_key, uint8_t key_type,

                               uint8_t pin_length);

  friend void BTM_PINCodeReply(const RawAddress& bd_addr, uint8_t res,

                               uint8_t pin_len, uint8_t* p_pin);

  friend void btm_sec_auth_complete(uint16_t handle, uint8_t status);

  friend void btm_sec_connected(const RawAddress& bda, uint16_t handle,

                                uint8_t status, uint8_t enc_mode);

  friend void btm_sec_encrypt_change(uint16_t handle, uint8_t status,

                                     uint8_t encr_enable);

  friend void btm_sec_link_key_notification(const RawAddress& p_bda,

                                            const Octet16& link_key,

                                            uint8_t key_type);

  friend tBTM_STATUS btm_sec_bond_by_transport(const RawAddress& bd_addr,

                                               tBT_TRANSPORT transport,

                                               uint8_t pin_len, uint8_t* p_pin);

  uint8_t pin_code_length; /* Length of the pin_code used for paring */

 public:

  uint16_t sec_flags; /* Current device security state      */

  bool is_device_authenticated() const {

    return sec_flags & BTM_SEC_AUTHENTICATED;